Rod-packing and process of making same.



A. MCLEAN.

ROD PACKING AND PROCESS OF MAKING SAME.

APPLICATION FILED AUG, 7, 1912.

1,082,890. Patented Dec, 30, 191 3.

Q ngmi UNITED STATES. PATENT OFFICE.

- ARCHIBALD MQLEAN, orron'r s'rnrrincooiu, WASHINGTON.

ROD-PACKING- AND PROCESS OF MAKING SAME.

Specification of Letters Patent. Application filed August 7, 1912. Serial No. 713,905.

Patented Dec. 30, 1913.

To all whom it may concern.-

Be it lmown that LAARCHIBALD MOLEAN, a citizen of the United States of America, and a resident of the town of ,Fort Steilacoom, in the county of Pierce and Stateof Washington, have invented certain new and useful Improvements in Rod-Packings and Processes of Making Same, of which the following isa specification.

.My invention has more particular reference to packing rings for piston rods and the like and it has for its primary object to provide a packing of this character which is of a compressible nature and including a lubricating element. I

vA further object resides in my improved -method for producing the packing.-

. With these and other objects in view, my invention resides in the features of construction and stepsin the method of production,

defined in my annexed-claims.

Referring to the accompanying drawing:

Figure l is anelev'ation of a packing unit constructed in accordance with my inven-' tion, and Fig. 2 is a longitudinal section of a stufling box equipped with my packing.

My packing comprises metallic fibers or shavings, as. 15, which are embedded in a body 12 consisting of a lubricating compound. This body comprises what I term a carrier, preferably consisting of hard grease, and graphite.

In practice, the hard grease is melted and the metallic fibers or shavings dipped into the same. Following this the fibers are removed and then immediately coated with graphite, this being conveniently effected by s rmkling the graphite into the mass of fi ber while the grease adhering thereto is in a warm condition. The graphite'is therefore held by the grease and the entire mass is now placed in a mold and pressed to form. In the construction shown in Fig. 2, I employ a packing ring comprising two units 9 which are mounted in a casing 6-, which latter has a removable head 7. This construction forms the subject matter of a separate application executed on even date herewith, and may be briefly described as follows:

Reference numeral 1, designates a stuffing box of ordinary construction, 2. the cap hereinafter described and succinctly therefor, and ,3 the piston or other rod extending therethrough.

Within the stuffing box 1 and bearing against the inner end wall thereof is a,

spring 4, this encircling stem. 3 and being seated on a boss 5 of casing 6.

- Casing 6 has its outer end portion formed cylindrical andits inner end portion tapered or substantially conical, as at 6'. Head 7 which operates in casing 6 has a conical seat 7 opposing the tapered casing portion 6.

Reference numeral 8 indicates a ring seated against the inner face of cap 2 and having its inner face formed convex and engaged 1n the concave outer face of head 7.

Packing units 9 which abut one another have their other end portions conical in ,form to have snug fit in the'casing parts 6,

7 respectively. By this construction, sprlng 4 yieldingly presses casing 6 over head 7 as the lubricant element of the packing is taken up by the rod 3.

Metallic fibers or shavings 15 are of a resilient nature and when embedded in the lubricant, will yield during the compression of the packing. .They are composed of a composition of antimony and lead, these two metals being first combined in a molten condition and afterward reduced on a lathe to shavings or-thin narrow strips.

. Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of;== the United States of Amerlca, 1s:

1. The method of producing packing material, -which consists in first placing an initial coating of grease on metallic strands, and afterward applying to the said grease- 

